01-osm

Load Data

# query <- getbb("Leuven, Belgium") %>%
#   opq() %>%
#   add_osm_feature("highway") %>%
#   osmdata_sf()
# 
# glimpse(query)
# 
# leuvenHighways <- query$osm_lines
# 
# glimpse((leuvenHighways))

##save

# saveRDS(leuvenHighways, 
#         here::here('data/rawData/leuvenHighways.rds'))

leuvenHighways <- readRDS(here::here('data/rawData/leuvenHighways.rds'))

wrnagle data

leuvenHighwayFilter <- leuvenHighways %>%
  select(osm_id, geometry)

do a map

leuvenHighwayFilter %>% 
  tm_shape()+
  tm_lines()

leuvenHighwayFilter <- leuvenHighways %>% 
  select(osm_id, highway, geometry)

# query <- getbb("Leuven, Belgium") %>%
#   opq() %>%
#   add_osm_feature("name", 'Sint-Pieterskerk') %>%
#   osmdata_sf()
# 
# glimpse(query)
# 
# mapCenter <- query$osm_polygons
# 
# glimpse((leuvenHighways))

#saveRDS(mapCenter, 
       # here::here('data/rawData/mapCenter.rds'))

mapCenter <- readRDS(here::here('data/rawData/mapCenter.rds'))

mapBuffer <- mapCenter %>% 
  st_transform(3857) %>% 
  summarise(geometry = st_union(geometry)) %>% 
  st_centroid() %>% 
  st_buffer(500) %>%
  st_as_sf()

glimpse(mapBuffer)

## Rows: 1
## Columns: 1
## $ geometry <POLYGON [m]> POLYGON ((523837.9 6600010,...

tm_shape(mapBuffer)+
  tm_borders(lwd =2, lty='dashed')+
  tm_dots()+
  tm_fill(col ='red')

##chose a roads

mapRoads <- leuvenHighwayFilter %>% 
  st_transform(3857) %>% 
  st_intersection(mapBuffer)

## Warning: attribute variables are assumed to be spatially constant throughout all
## geometries

glimpse(mapRoads)

## Rows: 385
## Columns: 3
## $ osm_id   <chr> "3343955", "3616406", "3616407", "3869834", "3877007", "39916~
## $ highway  <chr> "pedestrian", "residential", "service", "residential", "resid~
## $ geometry <LINESTRING [m]> LINESTRING (523518.5 659989..., LINESTRING (523284~

tm_shape(mapRoads)+
  tm_lines(col='highway')+
  tm_shape(mapBuffer)+
  tm_borders(lwd=3.5)

mapRoadsSP <- as(mapRoads, 'Spatial') %>% 
  as.data.frame()

glimpse(mapRoadsSP)

## Rows: 385
## Columns: 2
## $ osm_id  <chr> "3343955", "3616406", "3616407", "3869834", "3877007", "399163~
## $ highway <chr> "pedestrian", "residential", "service", "residential", "reside~